ANBI 411.3 Lecture Notes - Lecture 8: Statistical Hypothesis Testing, Dust Bathing, Battery Cage
20 Jun 2018
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Lecture 8: Freedom of Movement
Behavioral needs:
- Behavioral needs are less evident and less critical
- However, if important:
oRestricting behavior should have a negative result such as frustration, boredom,
depression, psychosis
oAllowing behavior should have positive result such as superior health,
productivity or positive behaviors
This tells us this behavior is important
- To determine if performing a behavior influences welfare, we need to understand the
motivation behind the behavior
oWhat causes it to start
oWhat causes it to stop
oDo they need to perform the behavior, or do they just want the consequence
oSometimes yes and sometimes no
Externally motivated: motivation to perform the behavior is controlled by environmental clues
- Providing the results satisfies/ extinguishes the motivation
Internally motivated: motivation is internally controlled
- Only doing the behavior will reduce motivation
Many behaviors are both internally and externally motivated
Original assumption was that behavior is controlled externally
- If the need is met the behavior become unnecessary
- Example: give a gerbil a tunnel, it will stop “digging”
Have since found many behaviors internally motivated
- Example: feed a cat but it still hunts
Appetitive and consummatory phases are separate activities
- Feedback systems
General feedback model: so we can understand when normal behavior is not happening
Models of internal motivation
- When prevented from doing the behavior, motivation increases over time
- When allowed- behavior is performed at greater intensity
- Rebound effect
o“rebound” may indicate negative state during deprivation
oOR it may result from increased sensitivity to external cues
Greater response to stimulus following absence
Therefore, welfare neutral
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Document Summary
Behavioral needs are less evident and less critical. However, if important: restricting behavior should have a negative result such as frustration, boredom, depression, psychosis, allowing behavior should have positive result such as superior health, productivity or positive behaviors. Externally motivated: motivation to perform the behavior is controlled by environmental clues. Only doing the behavior will reduce motivation. Many behaviors are both internally and externally motivated. Original assumption was that behavior is controlled externally. If the need is met the behavior become unnecessary. Example: give a gerbil a tunnel, it will stop digging . Example: feed a cat but it still hunts. General feedback model: so we can understand when normal behavior is not happening. When prevented from doing the behavior, motivation increases over time. When allowed- behavior is performed at greater intensity. Rebound effect: rebound may indicate negative state during deprivation, or it may result from increased sensitivity to external cues.
